The Two-striped telamonia (Telamonia dimidiata),

One of the many jumping spiders found in the Malaysian tropical rain forest, jumping spiders forms the largest family of spiders from the family Salticidae.

Jumping spiders get their names from its ability to jump from place to place spunning silk if need be while jumping, the silk is used as anchorage just in case it falls, it can climb back up the spunned silk.

The two striped telamonia, made famous by an e-mail hoax circulated widely around the globe around 2002 and till now occasionally still being circulated in many edited form still referencing to the two striped Telamonia spider. The hoax claims its bite is fatal and they are usually found lurking under toilet seats waiting to bite on any unsuspecting victim’s butt. Some e-mail hoax actually titled the e-mail “Butt Spider”.

Further information on the hoax can be found in this site: http://www.snopes.com/horrors/insects/telamonia.asp